Update the files which contain no license information with the
'Apache-2.0' SPDX license identifier. Many source files in the tree are
missing licensing information, which makes it harder for compliance
tools to determine the correct license.
By default all files without license information are under the default
license of Zephyr, which is Apache version 2.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The EFR32™ Mighty Gecko Starter Kit EFR32MG-SLTB004A (a.k.a
Thunderboard Sense 2) contains a MCU from the EFR32MG12P family built
on ARM® Cortex®-M4F processor with low power capabilities.
There is an On-Board J-Link Debugger that presents a virtual COM port
for general purpose application serial data transfer with this
interface and a Mass Storage for firmware flashing.
Signed-off-by: Diego Sueiro <diego.sueiro@gmail.com>